Journal
CHEMICAL PHYSICS LETTERS
Volume 370, Issue 1-2, Pages 254-260Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0009-2614(03)00104-0
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The surface plasmon energy of gold clusters formed by Ar(+) ion beam mixing of Au/silica is investigated for the size effect. The redshift with decreasing cluster size is assigned to the 'spillout' effect in small clusters (<5 nm). Core-electron contribution to the metal dielectric function is mainly responsible for the blueshift with decreasing cluster size (quenching of the size effect) in case of bigger cluster size (>5 run), assisted with annealing treatment. The competition between 'spillout' effect and the frequency dependence of interband dielectric function leads to a quasiquenching of the size effects in the optical response. (C) 2003 Elsevier Science B.V. All rights reserved.
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